Attentional bias toward negative stimuli in PTSD: an eye-tracking study

注意偏差 心理学 眼球运动 眼动 听力学 可视化快速呈现 神经科学 认知 医学 光学 物理
作者
Émilie Veerapa,Pierre Grandgenèvre,Guillaume Vaïva,Stéphane Duhem,Mohamed El Fayoumi,Benjamin Vinnac,Sébastien Szaffarczyk,Marielle Wathelet,Thomas Fovet,Fabien D’Hondt
出处
期刊:Psychological Medicine [Cambridge University Press]
卷期号:53 (12): 5809-5817 被引量:13
标识
DOI:10.1017/s0033291722003063
摘要

Research on biased processing of aversive stimuli in posttraumatic stress disorder (PTSD) has produced inconsistent results between response time (RT) and eye-tracking studies. Recent RT-based results of dot-probe studies showed no attentional bias (AB) for threat while eye-tracking research suggested heightened sustained attention for this information. Here, we used both RT-based and eye-tracking measures to explore the dynamics of AB to negative stimuli in PTSD.Twenty-three individuals diagnosed with PTSD, 23 trauma-exposed healthy controls, and 23 healthy controls performed an emotional dot-probe task with pairs of negative and neutral scenes presented for either 1 or 2 s. Analyses included eye movements during the presentation of the scenes and RT associated with target localization.There was no evidence for an AB toward negative stimuli in PTSD from RT measures. However, the main eye-tracking results revealed that all three groups showed longer dwell times on negative pictures than neutral pictures at 1 s and that this AB was stronger for individuals with PTSD. Moreover, although AB disappeared for the two groups of healthy controls with prolonged exposure, it persisted for individuals with PTSD.PTSD is associated with an AB toward negative stimuli, characterized by heightened sustained attention toward negative scenes once detected. This study sheds light on the dynamics of AB to negative stimuli in PTSD and encourages us to consider optimized therapeutic interventions targeting abnormal AB patterns.
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